RE: [xml-dev] Disk-based XPath Processing

["Michael Kay" <mike@saxonica.com>]

> 
> What you describe in the above para is pretty much exactly 
> what Amara's pushbind and pushdom allow, and the trimxml tool 
> that John L. Clark mentions, exposes this approach on the 
> command line.  They use a subset of XSLT patterns (which are  
> themselves a subset of XPath, as defined int he XSLT 1.0 
> spec) to drive a streamable operation that only loads into 
> memory one subtree at a time from a larget document.

Saxon also allows streamed evaluation of a subset of XPath expressions. The
facility, and the XPath subset, are described at
http://www.saxonica.com/documentation/sourcedocs/serial.html

Michael Kay
http://www.saxonica.com/